GB1080459A - Differential amplifiers - Google Patents

Differential amplifiers

Info

Publication number
GB1080459A
GB1080459A GB12149/66A GB1214966A GB1080459A GB 1080459 A GB1080459 A GB 1080459A GB 12149/66 A GB12149/66 A GB 12149/66A GB 1214966 A GB1214966 A GB 1214966A GB 1080459 A GB1080459 A GB 1080459A
Authority
GB
United Kingdom
Prior art keywords
transistor
impedance
emitter
stage
collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12149/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Monsanto Co filed Critical Monsanto Co
Publication of GB1080459A publication Critical patent/GB1080459A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45398—Indexing scheme relating to differential amplifiers the AAC comprising a voltage generating circuit as bias circuit for the AAC
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45498—Indexing scheme relating to differential amplifiers the CSC comprising only resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45594—Indexing scheme relating to differential amplifiers the IC comprising one or more resistors, which are not biasing resistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45652—Indexing scheme relating to differential amplifiers the LC comprising one or more further dif amp stages, either identical to the dif amp or not, in cascade
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45701—Indexing scheme relating to differential amplifiers the LC comprising one resistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45702—Indexing scheme relating to differential amplifiers the LC comprising two resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45722—Indexing scheme relating to differential amplifiers the LC comprising one or more source followers, as post buffer or driver stages, in cascade in the LC

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1,080,459. Transistor amplifying circuits. MONSANTO CO. March 18, 1966 [March 22, 1965], No. 12149/66. Heading H3T. A differential amplifier with high common mode rejection comprises a pair of input transistors Q1, Q2 with as a common emitter circuit impedance a current generator conprising the collector-emitter path of a third transistor Q4 having a fixed base bias from potentiometer R6, R7. The collectors of transistors Q1, Q2 are provided with loads R3, R4 and direct coupled to the base of a similar second stage comprising transistors Q5, Q6 having transistor Q7 as common emitter circuit impedance, the output impedance of the first stage is made at least twenty times greater than the input impedance of the second. A third stage Q8, Q9 has a resistor R15 as common emitter impedance, output being obtained from the collector load resistor R16 of transistor Q9, via a two-stage emitter-follower Q10, Q11. The emitter-collector path of a further transistor Q3 is included in the supply to the input transistors Q1, Q2, to reduce the potential applied to their collectors. When the arrangement is used as an operational amplifier with feed-back between output and input, stability is obtained by connection of a passive phasecorrection network to the compensation terminal provided in the collector circuit of the transistor Q9.
GB12149/66A 1965-03-22 1966-03-18 Differential amplifiers Expired GB1080459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US441557A US3401350A (en) 1965-03-22 1965-03-22 Differential amplifier

Publications (1)

Publication Number Publication Date
GB1080459A true GB1080459A (en) 1967-08-23

Family

ID=23753356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12149/66A Expired GB1080459A (en) 1965-03-22 1966-03-18 Differential amplifiers

Country Status (3)

Country Link
US (1) US3401350A (en)
DE (1) DE1293860B (en)
GB (1) GB1080459A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569848A (en) * 1968-12-12 1971-03-09 Ibm Unconditionally stable, open loop operational amplifier
US3648069A (en) * 1970-10-13 1972-03-07 Motorola Inc Differential trigger circuit
JPS5548736B2 (en) * 1975-02-26 1980-12-08
JPS57166670A (en) * 1981-04-06 1982-10-14 Sony Corp Division circuit
US5021744A (en) * 1989-02-14 1991-06-04 U.S. Philips Corporation Differential amplifier with differential or single-ended output
CN109075746B (en) * 2016-05-12 2021-06-29 华为技术有限公司 Circuit comprising voltage dropping element

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB975453A (en) * 1960-08-12 1964-11-18 English Electric Co Ltd Improvements in or relating to transistor circuits
US3182269A (en) * 1961-02-17 1965-05-04 Honeywell Inc Differential amplifier bias circuit
US3327235A (en) * 1964-05-28 1967-06-20 Westinghouse Electric Corp Dc amplifier having single time delay characteristic

Also Published As

Publication number Publication date
DE1293860B (en) 1969-04-30
US3401350A (en) 1968-09-10

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